A couple of weeks ago, while at the local Market District Giant Eagle (grocery store), I spotted a new, bright-yellow addition to the usual mounds of plums, peaches, and nectarines. The sign said "Lemon Plums" ($2.49/lb), and described them as a very rare fruit. The color was a little more fluorescent than a lemon's, but the bottom of the plums did have that nubby shape that is characteristic to both ends of the lemon. I bought one to satisfy my curiosity, especially since they weren't any more expensive than regular old tree-ripened black or red plums (makes you wonder how rare they really are!).
The sign said that, as the plum ripened, its brilliant lemon-yellow color would gradually turn to a pretty red hue. So I waited. And waited. I waited for over a week. FINALLY, the plum did start to turn red. It was actually rather a stunning display, as if the plum were in the midst of a slow-motion blush. I knew the plum was finally ripening by the actual firmness.
When Karl and I finally tasted it, we decided that yes, it was delicious, but it didn't really taste much different from a regular plum. Maybe for this time of year, it tastes sweeter than most plums, but we did wait almost 10 days for the thing to ripen.
Incidentally, I cannot find anything about this fruit on the internet. Weird, right? Even Wikipedia's article on Plums doesn't mention this particular "cultivar" ("a plant variety that has been produced in cultivation by selective breeding," according to my MacBook dictionary).
So, if anyone knows anything about this mysterious fruit, do tell!